These 1" length #2 Phillips drive Pan Head 410 STAINLESS STEEL Self-Drilling screws are #10-16 (16 threads per inch) #3 Point. 410 Stainless steel is a low-carbon grade of hardenable stainless steel. This product is passivated and waxed. The process of passivation creates a surface film causing the metal to lose its chemical reactivity with environmental factors such as air or water resulting in high corrosion resistance. Meets F.I.P.-1000.7 for torsional strength and drill speed. Meets SAE J78 for performance & dimensional specifications. Each box contains approximately 4,000 screws (30 pounds)